I'm not sure what color I'd like to change it to, however my Saab's instrument panel was green and that didn't bother me. When I test-drove the '12 Impreza a month ago, I believe it was the intensity of the color (red) that really got to me. I don't recall if there was a button, switch or setting for the intensity, but it seemed to bother me no matter what. The test drive was in late afternoon/early evening, so it was very bright to begin with. Based on that information I assumed that since it bothered me during that time of day, it would be that much worse at night.
Thanks for your input 199. I'm not sure if that's true, but I do know that green is typically the most relaxing color.